by Dr. Ir. Muhammad Rasyaf, MS $9.00
by Reza A.A. Wattimena $9.00
by James McManus, CSsR, STL. $3.00
by ISEI $26.00
by Gregory F. A. Pierce $8.00
by Dr. FX. Mudji Sutrisno & Hendra Putranto $9.00